TY - JOUR
T1 - Yaw effects on train aerodynamics on a double-track viaduct
T2 - A wind tunnel study
AU - Li, Wenhui
AU - Liu, Tanghong
AU - Martinez-Vazquez, Pedro
AU - Chen, Zhengwei
AU - Huo, Xiaoshuai
AU - Guo, Zijian
AU - Xia, Yutao
N1 - Funding Information:
The authors acknowledge the experimental supports provided by the China Aerodynamics Research and Development Centre (CARDC). The authors are indebted to Zhixiang Huang and Li Chen for their invaluable and substantive counsel during the tests. This work was supported by the National Railway Administration of China (Grant No. 18T043), the National Railway Administration of China (Grant No. 2018Z035), and the Fundamental Research Funds for the Central Universities of Central South University (Grant No. 2021zzts0170 and No. 2021zzts0163).
Publisher Copyright:
© 2021 Techno Press. All rights reserved.
PY - 2021/9
Y1 - 2021/9
N2 - The aerodynamic performance of a scaled high-speed train model mounted on a double-track viaduct was studied through a wind tunnel test. The pressure distribution of different loops and the centerline on the streamlined nose region, as well as the aerodynamic load coefficients of the leading car were explored under yaw effects ranging from β=-30° to β=30°. Results showed that Reynolds effects became independent when the wind speed surpassed 40 m/s, the corresponding Re of which equals 6.51 × 105. The pressures recorded along the centerline of train nose for the upstream scenario, was more sensitive to the yaw effects as the largest pressure difference gradually broadened against yaw angles. In addition, the pressure coefficients along the centerline and symmetrical taps of the loops, approximately fit a quadratic relationship with respect to yaw angles. The presence of the tracks and viaduct decks somehow mitigated the intensity of the airflow at downstream side. The experimental test also revealed that, the upstream configuration provided higher mean side force, yawing, and rolling moments up to β=20° whereas over that angle the force and moments exhibited the opposite performance.
AB - The aerodynamic performance of a scaled high-speed train model mounted on a double-track viaduct was studied through a wind tunnel test. The pressure distribution of different loops and the centerline on the streamlined nose region, as well as the aerodynamic load coefficients of the leading car were explored under yaw effects ranging from β=-30° to β=30°. Results showed that Reynolds effects became independent when the wind speed surpassed 40 m/s, the corresponding Re of which equals 6.51 × 105. The pressures recorded along the centerline of train nose for the upstream scenario, was more sensitive to the yaw effects as the largest pressure difference gradually broadened against yaw angles. In addition, the pressure coefficients along the centerline and symmetrical taps of the loops, approximately fit a quadratic relationship with respect to yaw angles. The presence of the tracks and viaduct decks somehow mitigated the intensity of the airflow at downstream side. The experimental test also revealed that, the upstream configuration provided higher mean side force, yawing, and rolling moments up to β=20° whereas over that angle the force and moments exhibited the opposite performance.
KW - Aerodynamic coefficient
KW - Pressure distribution
KW - Viaduct
KW - Wind tunnel test
KW - Yaw angle
UR - http://www.scopus.com/inward/record.url?scp=85124157654&partnerID=8YFLogxK
U2 - 10.12989/was.2021.33.3.201
DO - 10.12989/was.2021.33.3.201
M3 - Journal article
AN - SCOPUS:85124157654
SN - 1226-6116
VL - 33
SP - 201
EP - 215
JO - Wind and Structures, An International Journal
JF - Wind and Structures, An International Journal
IS - 3
ER -